/// <summary>Encode Pdu class to BER byte buffer</summary>
/// <remarks>
/// Encodes the protocol data unit using the passed encoder and stores
/// the results in the passed buffer. An exception is thrown if an
/// error occurs with the encoding of the information.
/// </remarks>
/// <param name="buffer">The buffer to write the encoded information.</param>
public override void Encode(MutableByte buffer)
{
MutableByte tmpBuffer = new MutableByte();
// if request id is 0, get a random value
if (requestId.Value == 0)
{
requestId.SetRandom();
}
requestId.Encode(tmpBuffer);
errorStatus.Encode(tmpBuffer);
errorIndex.Encode(tmpBuffer);
// if V2TRAP PDU type, add sysUpTime and trapObjectID OIDs before encoding VarBind
if (Type == EPduType.V2Trap || Type == EPduType.Inform)
{
if (VbList.Count == 0)
{
// add sysUpTime and trapObjectID to the VbList
VbList.Add(SnmpConstants.SysUpTime, TrapSysUpTime);
VbList.Add(SnmpConstants.TrapObjectId, trapObjectID);
}
else
{
// Make sure user didn't manually add sysUpTime and trapObjectID values
// to the pdu
// if we have more then one item in the VarBinds array check for sysUpTime
if (VbList.Count > 0)
{
// if the first Vb in the VarBinds array is not sysUpTime append it in the
// encoded byte array
if (!VbList[0].Oid.Equals(SnmpConstants.SysUpTime))
{
Vb sysUpTimeVb = new Vb(SnmpConstants.SysUpTime, TrapSysUpTime);
VbList.Insert(0, sysUpTimeVb);
}
}
// if we have 2 or more Vbs in the VarBinds array check for trapObjectID Vb
if (VbList.Count > 1)
{
// if second Vb in the VarBinds array is not trapObjectId encode the value
if (!VbList[1].Oid.Equals(SnmpConstants.TrapObjectId))
{
Vb trapObjectIdVb = new Vb(SnmpConstants.TrapObjectId, trapObjectID);
VbList.Insert(1, trapObjectIdVb);
}
}
}
}
// encode variable bindings
VbList.Encode(tmpBuffer);
// Now encode the header for the PDU
BuildHeader(buffer, (byte)Type, tmpBuffer.Length);
buffer.Append(tmpBuffer);
}
/// <summary>Constructor.</summary>
/// <remarks>Initializes all values to NULL and PDU type to GET</remarks>
public Pdu()
{
errorIndex = new Integer32();
errorStatus = new Integer32();
requestId = new Integer32();
requestId.SetRandom();
base.Type = (byte)EPduType.Get;
VbList = new VbCollection();
TrapSysUpTime = new TimeTicks();
trapObjectID = new Oid();
}
/// <summary>
/// Constructor.
/// </summary>
/// <remarks>
/// Initializes all values to NULL and PDU type to GET
/// </remarks>
public Pdu()
{
_vbs = null;
_errorIndex = new Integer32();
_errorStatus = new Integer32();
_requestId = new Integer32();
_requestId.SetRandom();
_asnType = (byte)PduType.Get;
_vbs = new VbCollection();
_trapTimeStamp = new TimeTicks();
_trapObjectID = new Oid();
}